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Oil soluble corrosion inhibitor for oil pipe of gas well and preparation method thereof

An oil-soluble corrosion inhibitor and tubing technology, which is applied in the fields of petroleum and petrochemical, gas well tubing and equipment protection, can solve the problems affecting the stability and anti-corrosion effect of corrosion inhibitors, and achieve good planar spreadability, good compatibility, and no corrosion resistance. The effect of easy desorption

Active Publication Date: 2020-04-17
西安三维科技发展有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides an oil-soluble corrosion inhibitor for gas well tubing and its preparation method, which is used to solve the problem that the existing imidazoline corrosion inhibitors cause the ring opening of imidazolines under long-term storage, thereby affecting the stability and anticorrosion effect of the corrosion inhibitors. question

Method used

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  • Oil soluble corrosion inhibitor for oil pipe of gas well and preparation method thereof
  • Oil soluble corrosion inhibitor for oil pipe of gas well and preparation method thereof
  • Oil soluble corrosion inhibitor for oil pipe of gas well and preparation method thereof

Examples

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Embodiment 1

[0031] Embodiment 1 of the present invention provides an oil-soluble corrosion inhibitor for gas well tubing. According to the mass fraction, its raw material is composed of 25% of the main agent and 75% of the compound, wherein the main agent is imidazoline Schiff base, and the compound The compound is based on the total mass of the oil-soluble corrosion inhibitor for gas well tubing, and the compound is composed of 10% benzotriazole, 7% hydroxyethyl thiosuccinic acid, and 58% solvent naphtha 200#.

[0032] Specifically, the preparation method of an oil-soluble corrosion inhibitor for gas well tubing comprises the following steps:

[0033] (1) Aspartic acid and diethylenetriamine are added into the reaction kettle according to the molar ratio of 1:1.2 for reaction, and water-carrying agent xylene is added at the same time, wherein the xylene water-carrying agent is oil for gas well tubing 10% of the total mass of the soluble corrosion inhibitor, heating and stirring to 150-16...

Embodiment 2

[0045] Embodiment 2 of the present invention provides an oil-soluble corrosion inhibitor for gas well tubing. According to the mass fraction, its raw material is composed of 20% of the main agent and 80% of the compound, wherein the main agent is imidazoline Schiff base, and the compound The compound is based on the total mass of the oil-soluble corrosion inhibitor for gas well tubing, and the compound is composed of 15% aromatic azole, 10% hydroxyethyl thiosuccinic acid and 55% solvent.

[0046] Wherein, the aromatic azole is selected from mercaptobenzothiazole, and the solvent is selected from solvent naphtha 100#.

[0047] Specifically, the preparation method of an oil-soluble corrosion inhibitor for gas well tubing comprises the following steps:

[0048] (1) Aspartic acid and triethylenetetramine are added to the reaction kettle according to the molar ratio of 1:1.5 to react, and xylene water-carrying agent is added at the same time, wherein the water-carrying agent xylene...

Embodiment 3

[0060] Embodiment 3 of the present invention provides an oil-soluble corrosion inhibitor for gas well tubing. According to the mass fraction, its raw materials are composed of 20% of the main agent and 80% of the compound, wherein the main agent is imidazoline Schiff base, and the compound The compound is based on the total mass of the oil-soluble corrosion inhibitor for gas well tubing, and the compound is composed of 10% aromatic azole, 5% hydroxyethyl thiosuccinic acid and 65% solvent.

[0061] Wherein, the aromatic azole is selected to be methyl benzotriazole, and the solvent is selected mineral spirits 100#.

[0062] Specifically, the preparation method of an oil-soluble corrosion inhibitor for gas well tubing comprises the following steps:

[0063] (1) Aspartic acid and tetraethylenepentamine are added to the reaction kettle according to the molar ratio of 1:1.5 to react, and xylene water-carrying agent is added at the same time, wherein the water-carrying agent xylene i...

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Abstract

The invention discloses an oil soluble corrosion inhibitor for an oil pipe of a gas well and a preparation method thereof for solving the problem that the stability and the corrosion-resistant effectof the corrosion inhibitor are affected as a result of ring opening of imidazoline because an existing imidazoline corrosion inhibitor is stored for a long time. Raw materials of the corrosion inhibitor are prepared from 20-30% by mass of a main agent and 70-80% by mass of a complex, wherein the main agent is imidazoline Schiff base. Based on total mass of the oil soluble corrosion inhibitor for the oil pipe of the gas well, the complex is prepared from 10-15% of aromatic azole, 5-10% of hydroxyethyl thiodisuccinic acid and 45-65% of a solvent. The corrosion inhibitor is suitable for the oil pipe of the gas well of a low water content, can be adsorbed to the inner wall of a pipeline quickly, and can be adsorbed in the oil pipe of the gas well to form a compact corrosion inhibitor protecting film which has very good protecting action to a carbon steel pipeline and equipment in a gas well environment containing CO2 gas. The oil soluble corrosion inhibitor has the characteristics of goodplane paving property, good compatibility with diesel oil, crude oil and condensate oil.

Description

technical field [0001] The invention relates to the technical field of gas well tubing and equipment protection in the petroleum and petrochemical field, and more specifically relates to an oil-soluble corrosion inhibitor for gas well tubing and a preparation method thereof. Background technique [0002] To effectively control corrosion in sulfur-containing environments, it is an economical and effective measure to apply corrosion inhibitor technology while making reasonable material selection. The use of corrosion inhibitors is an important method of corrosion protection at home and abroad, and the specific corrosion inhibition treatment process is determined according to the characteristics of the gathering and transportation system itself. [0003] At present, the industrial corrosion inhibitors used at home and abroad are basically adsorption corrosion inhibitors, such as Mannich bases, imidazoline derivatives, pyridine and quinoline quaternary ammonium salts, acetylenic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/10C23F11/14
CPCC23F11/10C23F11/149C09K8/54C09K2208/32
Inventor 张磊贺华镭苟利鹏杨金峰张进科陈岑李欢吴阳李乐徐磊丁平平
Owner 西安三维科技发展有限责任公司
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